Airtac BSED Clamping Double Acting Cylinder BSED125X50S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X50S combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 50mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke50 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X50S
The AirTAC BSED125X50S is a double-acting, double-rod ISO 15552 profile cylinder with an integrated spring-applied, air-released rod lock. A rod exits both ends, providing equal drive force of 5734 N each way at 0.5 MPa. The integrated collet lock delivers an 8600 N static holding force to maintain position securely during air loss or E-stop events.
This 125 mm bore actuator features a 32 mm rod with an M27x2 thread, PT1/2 cylinder ports, and a dedicated G1/8 release port. The extruded aluminum barrel offers ISO 15552 dimensional interchangeability without external tie rods. Equipped with a magnet (-S), it supports CMSE reed and DMSE electronic sensors for precise position feedback.
Double Rod + 8600 N Rod Lock (Ø125mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED125X50S holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED125X50S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X50S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X50S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED125X50S Is Used
Heavy Vertical Lift Platforms
Uses the 5734 N equal both-way drive to raise and lower heavy platens, engaging the 8600 N fail-safe lock to secure the load instantly if pneumatic pressure drops.
Large Press Indexing
Relies on the double-rod design to mount a rear cam for timing while the 8600 N collet holds the massive tooling carriage steady during heavy stamping cycles.
Pallet Arrestor Gates
Leverages equal push and pull forces to actuate heavy diverter arms, with the spring-applied lock preventing any drift when routing high-mass pallets.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X50S the Right Cylinder?
Select the BSED125X50S when your application demands symmetric both-way force and a fail-safe hold up to 8600 N. If your load to hold is under 3600 N, step down to the 100 mm bore (which provides 3681 N drive force at 0.5 MPa). As the largest standard bore, there is no step up; if 819 kgf max drive at 0.7 MPa is insufficient, evaluate dual-cylinder setups. Always engage the lock only after the rod stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds.
To replace this model, match the 125 mm bore, 50 mm stroke, PT1/2 port, and -S magnet. The 40 mm cushion length absorbs impact at both ends, but the lock itself is the true holding device, not the air cushion.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED125X50S FAQ
The integrated rod lock is spring-applied, meaning it automatically clamps the rod with an 8600 N static holding force the moment air is lost or an E-stop is triggered, holding the load safely in place.
The drive force is equal both ways at 5734 N (0.5 MPa) and 8028 N (0.7 MPa), equating to a max drive of 819 kgf. It operates at 30-500 mm/s, and the lock provides an 8600 N static hold.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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